fix(core): prevent duplicate tool approval entries in auto-saved.toml (#19487)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/core/src/tools/write-file.ts

@@ -25,7 +25,7 @@ import {
   BaseDeclarativeTool,
   BaseToolInvocation,
   Kind,
-  ToolConfirmationOutcome,
+  type ToolConfirmationOutcome,
 } from './tools.js';
 import { ToolErrorType } from './tool-error.js';
 import { makeRelative, shortenPath } from '../utils/paths.js';
@@ -228,14 +228,9 @@ class WriteFileToolInvocation extends BaseToolInvocation<
       fileDiff,
       originalContent,
       newContent: correctedContent,
-      onConfirm: async (outcome: ToolConfirmationOutcome) => {
-        if (outcome === ToolConfirmationOutcome.ProceedAlways) {
-          // No need to publish a policy update as the default policy for
-          // AUTO_EDIT already reflects always approving write-file.
-          this.config.setApprovalMode(ApprovalMode.AUTO_EDIT);
-        } else {
-          await this.publishPolicyUpdate(outcome);
-        }
+      onConfirm: async (_outcome: ToolConfirmationOutcome) => {
+        // Mode transitions (e.g. AUTO_EDIT) and policy updates are now
+        // handled centrally by the scheduler.
 
         if (ideConfirmation) {
           const result = await ideConfirmation;